LDAP won't start due to changes in DNS records

Hi folks, I rewrite this post because evidently the forums are not as safe as they promises to be, I edited my-first-post title in advanced mode and the system left the post with an empty content...
Anyway, it doesn't mother, I am going to explain the problem again xD.

We have a problem with the Zimbra Service either when we try to start it manually or when it auto-loads itself at the boot time due (apparently) to an LDAP problem!
Previously, we had changed DNS Records such as MX and others in order to change the server to a new one, so, when we got back to the old server, the described problem had appeared.

Now, the question is, How can I do to start the Zimbra service without it to check the DNS or whatever, just to perform a backup and move data to the new server??
Can I keep MDA without MTA? And take the emails back via IMAP for example?

I paste here some outputs I get...

Code:

zimbra@mail:~$ zmcontrol status
Unable to determine enabled services from ldap.
Unable to determine enabled services. Cache is out of date or doesn't exist.